Regulator



Nov. 16, 1965 A. J. HAUCK 3,218,544

REGULATOR Filed Jan. 11., 1963 1 1 FfH F g l INVENTOR flLoysu/s J fim/0A ATTORNE 5 United States Patent 3,218,544 REGULATOR Aloysius J.Hauck, Milwaukee, Wis., assignor to Basic Products Corporation,Milwaukee, Wis., a corporation of Wisconsin Filed Han. 11, 1963, Ser.No. 250,714 1 Claim. (Cl. 32389) This invention relates to powermodulating means and especially to an integrated current regulatorincluding saturable reactors.

In the prior art, when two saturable reactors have been used with DC.control windings, it has been found desirable or necessary to use aseries choke in the control winding circuit. Such has required the useof cores and windings for each of the saturable reactors and also a coreand windings for the separate choke.

One of the objects of the invention is to provide an integratedsaturable reactor and choke combination so as to conserve material andso as to provide a compact assembly.

In one aspect of the invention, an integrated structure is arrangedhaving two spaced saturable reactor cores, each having a saturablereactor gate winding. A single control winding is provided which linksthe two saturable reactors. A magnetic choke or third core is linkedwith said control winding so that it will introduce inductance into thecontrol winding means to absorb magnetically the second harmonicvoltages induced into the control winding by the saturable reactorcores. In one form, the choke core can be located between the saturablereactor cores. In a still further form, the choke core can have awinding thereon connected to a capacitor to assist in tuning the system.

The integral construction of the two reactors and the choke eliminatesconnections between separate units and the need for terminals on all ofthe units. Furthermore, polarity is inherently taken care of in theconstruction. The elongated structure which is made possible hereby alsois convenient for placing in an oil filled tank requiring a minimum offloor space.

Another advantage of the arrangement is that the high harmonic voltagesnormally appearing across the terminals of the saturable reactor controlwindings and across the choke will be neutralized in the magneticcircuits. Thus, the net voltage appearing at the terminals will berelatively small as compared with induced voltages appearing inconventional multi-unit construction.

These and other objects, advantages and features of the invention willbecome apparent from the following description and drawings.

In the drawings:

FIG. 1 is a schematic diagram of one connection for the invention; and

FIG. 2 is a perspective view of one construction.

Referring to FIG. 2, saturable reactor has core 11 with gate winding 12wound thereon. Saturable reactor 13 includes core 14 and gate winding 15Wound thereon.

Control winding 16 is wound so as to surround gate windings 12 and 15and to pass within cores 11 and 14. The choke core 17 may comprise acore having an air gap 18 and in the form shown does not have a separatewinding thereon. The control winding 16 has a portion within orassociated with said choke core so as to provide an integral chokesection in the control winding. The control winding links the saturablereactor cores and the choke core.

The choke core will magnetically absorb the second harmonic voltagesinduced in the control winding by the two saturable reactor cores. Suchwill force the saturable reactors to operate in the same manner asthough there were an external control circuit choke and yet to so dowithout an additional separate choke winding. Further, the arrangementwill eliminate appearance of relatively high induced voltages acrosseach of the saturable reactor control windings as well as across thechoke.

FIG. 1 schematically shows the arrangement of FIG. 2, the parts beinggiven similar reference numerals.

In a further modification, not shown in FIG. 2 but illustratedschematically in FIG. 1, winding 20 may be placed on core 17. Capacitor21 may be connected to winding 20, such arrangement assisting in tuningthe systerm.

The structure is shown as a single phase, two saturable reactor systembut it should be apparent that the principles can be applied to apolyphase arrangement and that other configurations can be used withoutdeparting from the spirit of the invention except as defined in theappended claim.

What is claimed is:

In an integrated power modulator, the combination including two spacedsaturable reactor magnetic cores, saturable reactor gate winding meanson each core, choke magnetic core means, tuning winding means mounted onsaid choke core means, and a single common saturable reactor controlwinding passing through and linking said two saturable reactor cores andsaid choke core means so as to introduce inductance into said controlwinding means to magnetically absorb second harmonic voltages inducedinto the control winding by said two saturable reactor cores, saidsaturable reactor magnetic cores and choke magnetic core means beingmounted on said single control winding.

References Cited by the Examiner UNITED STATES PATENTS 1,612,084 12/1926Weed 315-121 2,142,837 1/1939 Edwards 32389 2,531,820 11/1950 Lindenblad340174 X 2,870,268 1/1959 Mamon 32389 2,926,300 2/1960 Mamon 323893,016,486 1/1962 Ogle 323--89 3,123,764 3/1964 Patton 323-56 3,126,5263/1964 Wood 340174 LLOYD MCCOLLUM, Primary Examiner.

